dt-bindings: display/msm: add gcc-bus clock to dpu-smd845

Add gcc-bus clock required for the SDM845 DPU device tree node. This
change was made in the commit 111c5285 ("arm64: dts: qcom: sdm845:
move bus clock to mdp node for sdm845 target"), but was not reflected in
the schema.
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/508379/
Link: https://lore.kernel.org/r/20221024164225.3236654-3-dmitry.baryshkov@linaro.orgSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

Documentation/devicetree/bindings/display/msm/dpu-sdm845.yaml

@@ -84,6 +84,7 @@ patternProperties:
 
       clocks:
         items:
+          - description: Display GCC bus clock
           - description: Display ahb clock
           - description: Display axi clock
           - description: Display core clock
@@ -91,6 +92,7 @@ patternProperties:
 
       clock-names:
         items:
+          - const: gcc-bus
           - const: iface
           - const: bus
           - const: core
@@ -183,11 +185,12 @@ examples:
                           <0x0aeb0000 0x2008>;
                     reg-names = "mdp", "vbif";
 
-                    clocks = <&dispcc DISP_CC_MDSS_AHB_CLK>,
+                    clocks = <&gcc GCC_DISP_AXI_CLK>,
+                             <&dispcc DISP_CC_MDSS_AHB_CLK>,
                              <&dispcc DISP_CC_MDSS_AXI_CLK>,
                              <&dispcc DISP_CC_MDSS_MDP_CLK>,
                              <&dispcc DISP_CC_MDSS_VSYNC_CLK>;
-                    clock-names = "iface", "bus", "core", "vsync";
+                    clock-names = "gcc-bus", "iface", "bus", "core", "vsync";
 
                     interrupt-parent = <&mdss>;
                     interrupts = <0>;